add support to configure azure environment for AKS clusters

[zmalik]

/kind feature

Describe the solution you'd like
Add support for AKS clusters creation in an another cloud than US Public.

Anything else you would like to add:
we are currently leaving the azure.Environment empty for managed clusters which defaults to US Public cloud endpoints. It should continue to default to US Public cloud endpoint but providing an override mechanism would be helpful.
As allowing this to be configurable would allow users to create AKS clusters in other allowed environments.

Environment:

• cluster-api-provider-azure version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[zmalik]

/area managedclusters

[k8s-triage-robot]

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/lifecycle stale

[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Mark this issue as fresh with /remove-lifecycle rotten
• Close this issue with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle rotten

[dtzar]

/remove-lifecycle rotten

[CecileRobertMichon]

/close

already done in #3509

[k8s-ci-robot]

@CecileRobertMichon: Closing this issue.

In response to this:

/close

already done in #3509

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